Heck, I keep a space blanket in my not-too-big seat pack on my roadie. Useful in case of shock even if the ambient temperature isn't that low. I didn't figure there was any point in throwing away the one they wrapped me with on one finish line.
I have a few of those from IM finishes. I figure that if I ever use them again, the smell alone on them would be enough to wake an unconscious victim.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS